Nut-lock.



No. 877,628. PATENTED JAN. 28, 1908.

S. BENSON.

NUT LOCK.

APPLICATION FILED JUNE 23,1906.

W Y A TTORNEVS UNITED STATES PATENT OFFICE.

SIVERT BENSON, OF SPRING VALLEY, MINNESOTA, ASSIGNOR OF ONE-THIRD TOWILLIAM B. HUTTON AND ONE-THIRD TO RALPH J. PARKER, OF SPRING VALLEY,MINNESOTA.

NUT-LOCK.

Specification of Letters Patent.

Patented Jan. 28., 1908.

Application filed June 23.1906. Serial No. 323.095.

To all whom it may concern:

Be it known that I, SIVERT BENsoN, a citizen of the United States,residing at Spring Valley, in the county of Fillmore and State ofMinnesota, have invented a new and useful N ut-Lock, of which thefollowing is a specification.

This invention has relation to nut locks and it consists in the novelconstruction and arrangement of its parts as hereinafter shown anddescribed.

The object of this invention is to provide a nut lock which shall alsosupply the space and perform the functions of a washer, to render thesame more effective and reliable in operation than those heretofore usedand to secure other advantageous results.

A further object of the invention is to pro vide a nut lock having acertain amount of spring or resiliency, the spring member being soshaped that the nut will bear squarely against the same and evenlyimpinge the said member against the backing. That is to say the springmember will not exercise greater tension against one side of the nutthan the other side. The said spring member is also provided with spurswhich are adapted to engage the under face of the nut.

In the accompanying drawing :-Figure 1 is a side elevation of the-endsof rails showing the nut lock applied thereto. Fig. 2 is a transversesectional view of a rail and fish plates showing the nut lock appliedthereto. Fig. 3 is a perspective view of the spring member. Fig. 4 is anedge elevation of the spring member. Fig. 5 is an end elevation of thespring member.

The spring member 1 is made of spring steel. The middle portion 2thereof is substantially circular while the end portions 3, 3 extendsubstantially tangentially with relation to the said circular middleportion. The middle portion 2 is non-volute and is adapted to fit snuglyabout a bolt. The spring member 1 thus formed is curved along itslongitudinal axis as illustrated in Fig. 4 of the drawing so thatnormally the ends of the portions 3, 3 and the middle of the portion 2will rest upon the backing such as a fish plate. The longitudinal axisof the member 1 is considered to be a line erected at right angles tothe lower edges of the end portions 3, 3 and medially of the endsthereof and coincident with the radius of the middle ortion 2. Also byreferring to Fig. 5, it w' be observed that the inner ends of theportions 3, 3 are in a higher plane than the outer ends thereof, andthat the said ends lie in the arc of the same circle. This is due partlyto the longitudinal curving of the spring member and also due to thefact that the longitudinal axis of the said portions 3, 3 are inclinedat a slight angle to a horizontal. The upper edge of the central portion2 is provided with the spurs 4, 4 which are adapted to engage the underface of the nut 5 when the same is secured against the member 1. It willthus be seen that a nut locking member is provided which may be appliedto a bolt and nut without altering the construction of the same in anyrespect. Also that when the nut 5 is screwed down upon the bolt that thespring member 1 does not exert tension to a greater degree on oneportion of the face of the nut than upon another. That is to say thereis no tendency on the part of the spring member to twist the thread ofthe nut with relation to the thread of the bolt and that the nut maymove in true arallel relation along the longitudinal axis 0 the bolt.

With this form of spring member, there is no danger of the said springmember working into the perforations of a fish plate and consequently nowashers have to be used in connection with the nut lock.

I am aware that nut locks have been patented, for instance that patentedto D. O. WVard, September 1, 1901, 458,782, in which the general outlineof the spring member is somewhat similar to my construction but myconstruction differs and possesses advantages in that no portions of thespring member are twisted laterally and consequently the spring memberbears in lines against the face of the nut instead of at points andpresents a more efficient locks ing surface.

Having described my invention, what I claim as new and desire to secureby Letters Patent is A nut lock comprising a spring steel member havinga substantially circular and nonvolute middle portion with extendedends,

said middle portionhaving spurs located upon my own, I have heretoaffixed my signature its nut engaging edge, said spring member in thepresence of two Witnesses. being curved along its longitudinal axis, theSIVERT BENSON extending ends being curved transversely of i 5 the memberand lying in the arc of the same Witnesses:

circle. E. M. EDWARDS,

In testimony that I claim the foregoing as R. E. SHEPHARD.

